Intercontinental, Inc., uses a perpetual inventory system. Consider the following information about its inventory: On July 1, purchased 10 units for $910 or $91 per unit; On July 3, purchased 15 units for $1,590 or $106 per unit; On July 14, sold 20 units; On July 17, purchased 20 units for $2,300 or $115 per unit; On July 28, purchased 10 units for $1,190 or $119 per unit; On July 31, sold 23 units